[26522] in North American Network Operators' Group
Re: mail does bounce (was: Customers down?)
daemon@ATHENA.MIT.EDU (Owen DeLong)
Sun Jan 2 15:33:35 2000
Date: Sun, 2 Jan 2000 12:31:00 -0800
From: owen@dixon.delong.sj.ca.us (Owen DeLong)
Message-Id: <200001022031.MAA24085@irkutsk.delong.sj.ca.us>
To: nanog@merit.edu, sean@donelan.com
Errors-To: owner-nanog-outgoing@merit.edu
> On Sat, 01 January 2000, "Steven J. Sobol" wrote:
> > What I was referring to was a situation where the domain does exist in the
> > root nameservers but the authoritative nameservers are unavailable.
>
> So .COM exists in the root servers? How do you decide to treat second
> level domains (i.e. donelan.com) versus third level domains
> (i.e. www.donelan.com) versus third level domains under country code
> domains.
>
>
>
>
>
>
I'll take a stab at this:
Attempting to resolve a.b.c.d.e.f.g.h.i
If you get back a return value from DNS that says
"Authoritative answer, a.b.c.d.e.f.g.h.i does not exist"
Bounce the mail.
If you get back a return that says
"Resolving a.b.c.d.e.f.g.h.i timed out without a return"
Queue the mail.
This also works for i, h.i, g.h.i, f.g.h.i, etc.
Owen
